MULTILAYER BACKSHEET FOR PHOTOVOLTAIC MODULES, AND ITS PRODUCTION AND USE IN THE PRODUCTION OF PHOTOVOLTAIC MODULES
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United States of America Patent
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Issued Date -
Feb 2, 2012
app pub date -
Jul 20, 2011
filing date -
Jul 30, 2010
priority date (Note) -
Abandoned
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Abstract
A multilayer backsheet (1) for a photovoltaic module according to the invention comprises a first outside layer (2), a second outside layer (3) and at least one inside layer (4, 5) which is arranged between these outside layers (2, 3). This at least one inside layer (4, 5) forms a water-vapor barrier and/or oxygen barrier. All these layers (2, 3, 4, 5) are composed of polymers. The multilayer backsheet (1) for a photovoltaic module according to the invention is characterized in that at least one of the two outside layers (2, 3) comprises a polyamide, and that the at least one inside layer (4, 5) consists of polymers which are no fluoropolymers and do not comprise any polyethylene. Inside layers (4, 5) made of partly aromatic polyesters are used only in combination with at least one outside adhesion promoter layer (6) made of block copolyesteramide.
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